If you're planning to stay in Korea, whether short-term or long-term, one of the first things you'll need to sort out is a SIM card for your phone. You’ll need a local number to call, text, use data, and stay connected while navigating life in Korea.

Note: Travelers and some short-term residents may not be able to get specific phone numbers that work for apps like ordering food or shopping on platforms like Coupang, but they can still use their numbers for taxis and other basic services.

The Big 4: Major Telecom Providers in Korea

There are four main mobile service providers in Korea, each offering a variety of plans to suit your needs. Here’s a quick overview of the Big 4 telecom providers:

1. KT (Korea Telecom) KT is one of the largest providers in Korea and offers reliable service across the country. Known for its high-speed internet and excellent coverage, KT is a popular choice for both locals and foreigners. It offers affordable plans and great customer service. I've personally used KT for the longest time, and I loved the coverage and convenience.
2. SKT (SK Telecom) SKT is arguably the most famous telecom provider in Korea, offering extensive coverage, especially in urban areas. Known for its high-speed data and variety of plans, SKT is a great option for those who need a strong and reliable network. I also used SKT, and it worked great for me! They have more affordable options too.
3. LG U+ LG U+ is the third largest mobile operator in Korea. It offers competitive pricing and good data options. If you're looking for something more budget-friendly but still reliable, LG U+ could be a solid choice.
4. Cheongumobile Cheongumobile is a smaller, eco-conscious carrier. While it doesn’t have as large a network as the other providers, it’s a great option for short-term stays or budget-conscious residents. It’s becoming increasingly popular for tourists, and many students use it as well, though the store setups might feel a bit less comfortable compared to the bigger providers.

What You Need to Get a SIM Card

To purchase a SIM card in Korea, make sure you have the following documents:

• Passport (always have it with you!)
• Alien Registration Card (ARC) (for long-term residents)
• Proof of Address (lease or rental agreement)
• Korean Phone Number (you’ll get this when you buy the SIM)
• Visa (if applicable)

Once you have all the documents, you're ready to head to a store and grab your SIM card!